竹节硬碳的制备及储钠性能研究  

Preparation and Sodium Storage Properties of Bamboo Hard Carbon

作　　者：张高月 王傲[1] 应浩[1] 徐卫[1] 孙昊 孙康[1] 蒋剑春[1] ZHANG Gaoyue;WANG Ao;YING Hao;XU Wei;SUN Hao;SUN Kang;JIANG Jianchun(Institute of Chemical Industry of Forest Products,CAF,Key Lab.of Biomass Energy and Material,Jiangsu Province,Key Lab.of Chemical Engineering of Forest Products,National Forestry and Grassland Administration,National Engineering Research Center of Low-Carbon Processing and Utilization of Forest Biomass,Nanjing 210042,China;School of Energy and Environment,Southeast University,Nanjing 210096,China;Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources,Nanjing Forestry University,Nanjing 210037,China)

机构地区：[1]中国林业科学研究院林产化学工业研究所,江苏省生物质能源与材料重点实验室,国家林业和草原局林产化学工程重点实验室,林木生物质低碳高效利用国家工程研究中心,江苏南京210042 [2]东南大学能源与环境学院,江苏南京210096 [3]南京林业大学江苏省林业资源高效加工利用协同创新中心,江苏南京210037

出　　处：《生物质化学工程》2023年第6期1-7,共7页Biomass Chemical Engineering

基　　金：浙江省省院合作林业科技项目(2020SY03)。

摘　　要：以竹节为原料,采用预炭化结合高温精炼的两步法制备了用于钠离子电池负极的竹节硬碳材料,并探究了精炼温度对硬碳结构的影响规律及结构与储钠性能之间的构效关系。研究结果表明:高的精炼温度可以收缩孔道形成闭孔结构并降低比表面积,但同时会导致层间距的减小。精炼温度1400℃时制得的样品BHC-1400,其比表面积为9.2 m^(2)/g,层间距为0.375 nm,其丰富的闭孔结构与合理的层间距有利于储钠容量的提高。BHC-1400作为钠离子电池负极材料,在50 mA/g的电流密度下表现出高达364.3 mAh/g的储钠容量以及81.2%的首次库仑效率,经过5000次循环充放电后容量保持率为85%。Bamboo-based hard carbon materials for sodium ion battery anodes were prepared by a two-step method of pre-carbonization combined with high-temperature reforming using bamboo as raw material.The influence of reforming temperature on the structure of hard carbon,and the structure-activity relationship between structure and sodium storage performance were explored.The research results showed that the high refining temperature could shrink the pores to form a closed pore structure and reduce the specific surface area,as well as led to a decrease in the layer spacing.When the refining temperature was 1400℃,the specific surface area of the sample BHC-1400 was 9.2 m^(2)/g,and the layer spacing was 0.375 nm.Its rich closed-pore structure and reasonable interlayer spacing were beneficial to the improvement of sodium storage capacity.BHC-1400 exhibited a reversible sodium storage capacity up to 364.3 mAh/g at a current density of 50 mA/g and an initial Coulomb efficiency of 81.2%as an anode material for sodium-ion batteries.Capacity retention rate keeps at 85%after 5000 cycles of charging and discharging.

关 键 词：生物质 硬碳 钠离子电池 高温精炼 

分 类 号：TQ35[化学工程] TQ424